Fractals - Geomathematics: Theoretical Foundations, Applications and Future Developments - page 402

4.5

4

3.5

3

2.5

2

1.5

1

− 3.5 − 3 − 2.5 − 2 − 1.5 − 1 − 0.5 0 0.5 1 1.5

Log (Concentration Value)

Fig. 10.27 C-A plot for lognormal background with superimposed Turcotte anomalies restricted
to 25 % of total study area (Source: Agterberg 2007 , Fig. 9)

6000

5000

4000

3000

2000

1000

0

− 3 − 2.5 − 2 − 1.5 − 1 − 0.5 0 0.5 1 1.5

Log (Concentration Value)

Fig. 10.28 Frequencies of lognormal-Pareto mixture of Fig. 10.27 (Source: Agterberg 2007 ,
Fig. 10).

enrichment of the chemical element. Examples of local singularity mapping were
given in Cheng ( 2007 ) and Cheng and Agterberg ( 2009 ) for various elements in
stream sediments from the Gejiu area, Yunnan Province, China. The topic of
singularity analysis will be discussed in more detail in the next chapter.